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    <title>Document</title>
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        <my-component></my-component>
        <my-component></my-component>
        <my-component></my-component>
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<script>
    Vue.component('my-component',{
        data(){
            return {count:0}
        },
        template:'<button v-on:click="count++">被点击{{count}}次</button>'
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    var vm=new Vue({
        el:"#app"
    })
</script>
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